Wrench.



S. MOSS.

WRENCH.

APPLICATION IILED JAN. 22, 1913.

1,077,543. Patented N0v.4, 1913.

16' d *7 1 7 hil COLUMBIA PLANOGRAPH co., WASHIN c UNITED STATES PATENT onion.

SAMUEL MOSS, OF WALTHAM, MASSACHUSETTS.

WRENCH.

Specification of Letters Patent.

PatentedNov. 4, 1913.

Application filed January 22, 1913. Serial No. 743,459.

which may be manipulated in the same man.

ner as a ratchet wrench without the use of pawl and ratchet or teeth of any sort.

A further object of my invention is to provide a wrench which when in the act of applying or removing a nut will be as firm and substantial as the usual form of wrench, yet, which, at the same time, by reversing its movement, will allow the jaws to separate and the wrench be revolved about the nut, the jaws assuming a position to grasp the nut after the wrench has been rotated inclependent of the nut.

In the drawings: Figure 1 is a side elevation; Fig. 2 is a side elevation, the jaw members being shown in the position they assume as the wrench is moved independently of the nut; and Fig. 3 is a perspective view of the slidably mounted jaw member.

In the drawings, 10 designates the shank of the wrench which is formed with a reduced extension 11, the reduced extension being provided at its terminal 12 with an enlargement 13. A skeleton yoke 14 embraces the reduced portion or" the shank and is pivotally connected to the same, the pivot pin 15 passing through both walls of the yoke and the reduced portion of the shank. This yoke receives the sliding jaw member 16, the shank portion 17 of which is provided with the feed thread 18. A feed nut 19 is rotatably supported by the yoke 14, the worm 20 of said feed nut meshing with the thread of the jaw member 16 to feed the jaw member longitudinally of the shank 10. The inner member 21 consists of a yoke 22 which comprises spaced walls 23 and a connecting web 24, and this connecting web 24 extends the full length of the walls, thereby providing an opening 25 for the shank of the jaw member 16. The jaw member is thus disposed to slide through the skeleton yoke 14 and the yoke The walls 23 of the yoke 22 are formed with arcuate slots 26 through which extend the terminals 27 of a pin 28 which is supported by the enlargement 13 of the reduced portion of the shank 10. The yoke 22 is thus not only supported for pivotal movement with respect to the shank, but is also capable of a sliding movement, the terminals 27 of the pin 28 ridingin the arcuate slots when the jaws of the wrench are brought to the position shown in Fig. 2. p

The wrench, is used in the usual manner, being adjusted by means of the feed nut 19 until the jaws 16 and 21 properly engage the nut. The wrench is then rotated and,

:under ordinary circumstances, may be used in the same manner as the common wrench. \Vhen, however, it is desired to use the tool as a ratchet wrench, that is, when it is inconvenient to completely rotate the wrench, the jaws are adjusted on the nut and the wrench rotated. At the limit of the stroke pressure is applied to the shank 10 in a direction reverse to that in which the wrench has been moved in tightening the nut, this pressure forcing the terminals 27 of the pin 28 to ride in the arcuate slots 26 of the walls of the yoke 22, spacing the jaw members 16 and 21 to an extent which will allow the jaws to slip over the nut until the wrench has been brought to a position where it again may participate in a partial rotation about the nut. As soon as the jaws slip over the ridge of one face of the nut, they immediately grasp the next face. This return action of the jaws is caused by a spring 29 which is secured to the shank and which is interposed between the portion 30 of the skeleton yoke 14 and the shank, the spring being so arranged that its normal tendency is to maintain the work-engaging faces of the jaws parallel with the edge 31 of the terminal of the shank 10. The yokes 14 and 22 allow the jaw members to separate, thus permitting the same to slide over the square corners of the nut and yet, at the same time, forming a strong grasping means for the nut on an active stroke of the tool. It will also be noted that the construction is such that it may be economically manufactured and easily and quickly assembled.

hat I claim is 1. A wrench comprising a shank a yoke pivotally supported on the shank, resilient means for normally retaining the yoke at right angles to the shank, the'shank at its end remote from'its handle portion being formed with an enlargement, a'pin passing through said enlargement and projecting "its ends a yoke pivotally mounted on said pin supported by the enlarged end of the said i beyond both faces of the shank, a second yoke embracing the enlarged end of the shank, said yoke being formed with areuate slots which receive the terminals of the pin which passes through the shank, a jaw supported by the yokes, means carried by the first mentioned yoke for feeding the jaw through the yokes, both of said yokes being maintained parallel with each other and the workeng aging portion of the sliding jaw at all times. r I

2. A wrench comprising a shank, said shank being reduced in. width intermediate reduced portion resilient means for norinaily retamlng the yoke atrlght angles to the shank, the terminals of the shank adja cent the reduced portion heingenlarged, a

Oopies of this patent may be obtained for five cents each, by addressing the shank, a yoke receiving said enlarged end, said yoke being formed with arcuate slots which receive the pin which passes through,

the shank, the yoke including a sleeve, a

sliding jaw, the shank of which is supported In testimony whereof I aflix my signature in presence of two witnesses.

SAMUEL MOSS. [L. s]

ld itnesses LAVATER TV. Powms, EMMAv G. PowERs.

Gommissioner of Patents.

Washington, D. G." 

